Alois riedler



(No'lodel.) v l A. RIEDLER.

Y l Y VALVE GEAR. No. 572,720..

Patented Deo. 8, 1896,;

ma cams mins w, PnOTcvu'rHo.. wAsuma'rcN. D4 cA UNITED STATES PATENTOFFICE.

ALOIS RIEDLER, OF BERLIN, GERMANY.

VALVE-G EAR.

SPECIFICATION forming part of Letters Patent No. 572,720, dated December8, 1896.

Application filed January 26, 1895. Serial No. 536,345. (No model.)Patented in Germany March 20, 1891, No. 60,447, and

, March 27, 1892, No. 64,772, and in England March 26,1891,No.5,429.

T0 all whom it may concern.-

Be it known that I, ALOIs RIEDLER, a subject of the King of Prussia,German Emperor, residing at Berlin, Germany, have invented certain newand useful Improvements in Valve-Gears, (for which I have receivedpatents in Germany, No. 60,447, dated March 20, 1891, and No. 64,772,dated March 27, 1892, and in Great Britain, No. 5,429, dated March 26,1891,) of which the following is a specification.

The present invention relates to a valvegear for pumps, blowers, and thelike, and is designed to be employed in connection with valves whichopen automatically under the pressure or suction in the cylinder, butwhich are positively closed by the valve-gearing.

The invention consists in imparting to the valve operating mechanism anelastic or yielding quality which enables a continued movement of thevalve-operating device during the operative stroke of such device afterthe motion of the valve itself has ceased, indifferently as to whetherthe stoppage of the valve is due to its having properly closed into itsseating or to any irregular interruption of its motion. It will thus beevident that by means of the present device a breakdown of thevalve-gearing, owing to a premature stoppage of the valve motion fromany cause whatever, will be entirely avoided, since the valve-gearingcan perform its full stroke independently of the motion of the valve;and in order to make the present invention more easily intelligiblereference is had to the accompanying drawings, in which similar lettersof reference denote similar parts throughout the several views.

Figure 1 is a vertical section through the cylinder and pressure andsuction valves of a pump; Fig. 2, a plan View of the valve-oper atinglever as shown in elevation in connec-A tion with the pressure-valve ofthe pumpV illustrated in Fig. 1, Fig. 3 being a side elevation of thevalve-operating lever similar as in Fig. 1, but the gear havingcontinued its motion while the lever is arrested on the valve. Fig. 4 isa detail plan view of a modified form of valve-operating mechanism.

Referring to Fig. 1, s is the suction-valve, d the pressure-valve, and pthe plunger, of a pump. The pressure-valve el is operated by theclosing-lever b, made as a flat spring, having its end fixed tolever-arms e e, keyed to the pivot-spindle r, operated by areciprocating rod -zv and its opposite end resting on a pin c,connecting the free ends of the levers e e. The spring b must be set tosuch pressure as will enable it to close the valve at ordinaryresistance Without rising from the pin c. This is necessary to preventany pressure being exerted on the valve at the inoperative stroke of thelevers e e. Thus when the valve motion ceases from any cause whatever,the motion of the valve-gearing may continue to the end of its stroke,the pin c being free to move downwardly independently of the spring b,while the latter is arrested onv the valve, as shown in Fig. 3.

For the suction-valve s, Fig. 1, the gearing is shown removed from thevalve.

It is not necessary that the spring b forms the valve-closing leveritself. The spring may also be inserted at any point of thevalvegearing, -so that it is not in direct contact with the valve. Suchmodification is shown in Fig. 4, where instead of a flat spring a spirali is employed, having one end fast on the spindle r and the free endresting on an arm f, loosely mounted on the said spindle r and having` ahorizontally-projecting pin f at its free end engaging a lever f2, keyedto the spindle r. The operation of this form of the invention will beobvious from the drawings. On the stoppage of the valve thevalve-operating gear may continue its motion, twisting the spiral springc', the arm f remaining lodged against the valve.

I claim as my invention- 1. In a pump, the combination with a valve of avalve-gear disconnected from the valve, thus permitting the valve toopen automat ically when the gear is lifted from the valve, said gearcomprising a spindle and a lever secured to the spindle, and apositively-operated spring-controlled valve-closing arm connected to thespindle and adapted to be relieved from positive contact with the valveat or prior to its opening, and to contact with and bear on the valvebefore or at the closingv of the latter while the valve-gear continuesits movement through its operative stroke IOO and after the closingmovement of the valve has ceased, substantially as set forth.

2. The combination in a valve-gear for pumps of avalve not connected tosaid gear, which latter after being removed from the valve leaves itfree to open automatically With a positively-operated valve-closing arm,said arm being formed by a spring, one end of this spring beingconnected With the gear and the other end being loose, so that thisloose end separates from the gear when the valve is stopped and the gearcontinues its movement, substantially as set forth.

3. The combination in a valvegear for pumps of avalve not connected tosaid gear, which latter after being removed from the ALOIS RIEDLER.

Witnesses:

CHAs. KRUGER, WM. HAUPT.

